<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <ptml xmlns=" http://www.w3.org/1999/xhtml "> <pead> <meta http-equiv=" Content-type "content=" text/html; Charset=utf-8 "/> <title> code box can be written in a simple javascript</title> <script language=" javascript "type=" text/ JavaScript "> Function Btn_onclick () {try {var cmdwin =document.getelementbyid (" Txtre ");/Get text ID var str=" try{"+ Cmdwin.value+ "} catch (E) {alert (' Your code is wrong: ' +e.description ';}"; /constructor body, where the e.description is used to output the error message of the JavaScript code you entered var cmd = new function (str);//constructor cmd (); Call Function} catch (e) {alert ("Error:" +e.description)//Output error message, the error message used to process this section of JavaScript code}} </script> </pead> ; <body> <!--user interface, a text box, a button--> <div align= "center" > <textarea id= "txtre" > </textarea> & Lt;input id= "btntest" type= "button" value= "Execute program" onclick= "Return Btn_onclick ()"/> </div> </body> </ptml>
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
The above is from an example of an experiment to find out, posted out and everyone to share, but also their own preservation, hehe ...
